Why is water essential for life?
Water is essential for life because
(i) all life processes that take place in the cells require water medium.
(ii) water is needed for transportation of substances from one part of the body to the other in a dissolved form.
(iii) All the reactions in the body or within the cells occur between substances that are dissolved in water.
Write a note on how forests influence the quality of our air, soil and water resources.
What are the two things which are essential for all forms of life on the earth?
What is biosphere?
What are the physical components?
What is biotic component?
Does there exist any relationship between the climate and biotic components? If yes, explain with example.
What percentage of oxygen and nitrogen is present in the air?
Name the pollutants by which industries pollute air.
How is balance of carbon dioxide and oxygen maintained in the environment?
What is the percentage of carbon dioxide in the atmosphere of Venus and Mars?
Mock Test Series
